EPH Controls CDT2-24 User manual

CDT2-24
Brand
EPH Controls
Model
CDT2-24
Category
Thermostats
Type
User manual

EPH Controls CDT2-24 is a hardwired room thermostat designed to control your heating system. It features a 24V power supply, a temperature control range of 5 to 35°C, and a switching differential of 0.2 to 1°C. With its frost protection capability, it will automatically activate when the room temperature drops to 5°C in standby mode. The keypad lock function prevents unauthorized changes to settings. Additionally, you can set high and low temperature limits for added control. Its simple button interface and clear display make it user-friendly.

EPH Controls CDT2-24 is a hardwired room thermostat designed to control your heating system. It features a 24V power supply, a temperature control range of 5 to 35°C, and a switching differential of 0.2 to 1°C. With its frost protection capability, it will automatically activate when the room temperature drops to 5°C in standby mode. The keypad lock function prevents unauthorized changes to settings. Additionally, you can set high and low temperature limits for added control. Its simple button interface and clear display make it user-friendly.

CAUTION!
Before commencing any work on the electrical
connections, you must rst disconnect the thermostat
from the mains. None of the 24V connections must be live
until the installation has been completed and the housing
is closed. Only qualied electricians or authorised service
sta are permitted to open the thermostat.
There are parts that may carry mains voltage behind the
cover. The thermostat must not be left unsupervised
when open. (Prevent non specialists and especially
children from gaining access to it.)
Operating Instructions
Page 1 of 2
CDT2-24 Room Thermostat Hardwired
4. Installation
1. Factory default settings
8. Resetting the thermostat
7. Button / Symbol description
6. Frost protection
9. Keypad lock and unlock
2. Specications & wiring
Contacts: Volt Free
Temperature indicator: °C
Switching dierential: 0.4°C
In built frost protection: 5°C
High and Low temp. limitation: O
Blue backlight activated : for 10 secs after any button is pressed
Keypad lock: O
5°C
OFF
Reset button
Set point increase
Set point decrease
Set button
On / Standby button
Room temperature
Heating ON symbol
3. Mounting
Contents
1. Factory default settings
2. Specication & wiring
3. Mounting
4. Installation
5. Wiring diagram
6. Frost protection
7. Button / symbol description
8. Resetting the thermostat
9. Keypad lock and unlock
10. High and Low temperature limitation
11. Adjusting the switching dierential
12. Adjusting the setpoint temperature
Prior to setting the thermostat, it is neccessary to
complete all required settings described in this section.
5. Wiring diagram
Important: Keep this document
Power supply: 24Vac 50Hz
Power consumption: 8 VA
Temp. control range: 5 ... 35°C
Ambient temperature: 0 ... 50°C
Contact rating: 7A 24Vac
Dimensions: 84 x 84 x 30mm
Temperature sensor: NTC 10K Ohm @ 25°C
Switching dierential: Adjustable from 0.2/0.4/0.6/0.8/1.0˚C
Frost protection: Only operational in stand by mode
Slacken the fastening screw on the bottom of the thermostat with a philips
head screwdriver.
The thermostat is hinged and can be opened 180 degrees.
Mount the unit as described in section 3.
Wire the thermostat according to the wiring diagram.
Close the thermostat and tighten the fastening screw.
The mounting height should be 1.5 meters above the oor level.
The thermostat should be wall mounted in the room where the heating is to
be controlled.
The place of installation should be chosen so that the sensor can measure the
room temperature as accurately as possible.
Choose the mounting location to prevent direct exposure to sunlight or other
heating / cooling sources when mounted.
The unit can be tted to: 1. Recessed conduit boxes
2. Surface mounting boxes
3. Directly on walls.
If 24Vac output is required, terminals L & 2 must be electrically linked.
INTERNAL WIRING DIAGRAM CDT2-24 321LN
24Vac
SUPPLY
ON OFFCOM
Frost protection is built into this thermostat, it is pre xed at 5°C and is not
adjustable.
It will only be activated when the thermostat is in the stand by mode and
the room temperature reaches 5°C.
It is necessary to reset the thermostat prior to initial use.
Press and hold the button for 5 seconds.
dEL will appear on the screen.
Press the button on the side of the thermostat.
RESET
Set
To lock the keypad, press and hold the and buttons for 5 seconds.
will appear on the screen. The keypad is now locked.
To unlock the keypad, press and hold the and buttons for 5 seconds.
will disappear from the screen. The keypad is now unlocked.
20221006_CDT2-24-DS_Opsins_Hw_PK
EPH Controls Ireland
technical@ephcontrols.com www.ephcontrols.com
EPH Controls UK
technical@ephcontrols.com www.ephcontrols.co.uk
10. High and Low temperature limitation OFF
Set
Set
11. Adjusting the switching dierential
12. Adjusting the setpoint temperature
Press the button once, Di set will appear on the screen.
The factory default switching dierential of 0.4C will appear on the screen.
Press the and buttons to select the desired dierential from 0.2 - 1˚C.
Press the button to return to normal operation.
Set
Set
Press the or buttons to adjust the temperature setpoint.
An upper and lower temperature limit may be chosen.
Press and hold the and buttons for 10 seconds.
“Limit OFF” will appear on the screen.
Press the button to select “Limit ON” mode.
Press the button to conrm you wish to adjust the high limit temperature.
Press the and buttons to select the high limit temperature.
Press the button to select the low limit temperature mode.
Press the and buttons to select the low limit temperature.
Press the button and the thermostat is ready for operation.
“Limit” will appear on the screen.
To deactivate High and Low temperature limitation.
Press and hold the and buttons for 10 seconds.
“Limit ON” will appear on the screen.
Press the button to deactivate this function.
“Limit OFF” will appear on the screen.
Press the button and the thermostat is ready for operation.
Set
Set
Set
Set
Operating Instructions
Page 2 of 2
CDT2-24 Room Thermostat Hardwired
20221006_CDT2-24-DS_Opsins_Hw_PK
EPH Controls Ireland
technical@ephcontrols.com www.ephcontrols.com
EPH Controls UK
technical@ephcontrols.com www.ephcontrols.co.uk
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EPH Controls CDT2-24 User manual

CDT2-24
Brand
EPH Controls
Model
CDT2-24
Category
Thermostats
Type
User manual

EPH Controls CDT2-24 is a hardwired room thermostat designed to control your heating system. It features a 24V power supply, a temperature control range of 5 to 35°C, and a switching differential of 0.2 to 1°C. With its frost protection capability, it will automatically activate when the room temperature drops to 5°C in standby mode. The keypad lock function prevents unauthorized changes to settings. Additionally, you can set high and low temperature limits for added control. Its simple button interface and clear display make it user-friendly.

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